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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would like to model CO2 concentration in such situation:<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>          </span></span><![endif]>Single family house (wooden),<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>          </span></span><![endif]>Outside concentration: 350 ppm (constant),<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>          </span></span><![endif]>Initial inside concentration: 700 ppm,<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>          </span></span><![endif]>No sources, no sinks,<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>          </span></span><![endif]>Air node connection are defined (between thermal and external air nodes).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I defined CO2 with molar mass 44.01 kg/kmol, and I put 0.0007 kg/kg CO2 in each zone.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>But what value of decay (contaminant definition and zone definition) should I use???<o:p></o:p></p><p class=MsoNormal>What does it depend on?  <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards,<o:p></o:p></p><p class=MsoNormal>Karol<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-----------------------------------------<o:p></o:p></p><p class=MsoNormal>mgr inż. Karol Bandurski<o:p></o:p></p><p class=MsoNormal>Instytut Inżynierii Środowiska<o:p></o:p></p><p class=MsoNormal>Politechnika Poznańska<o:p></o:p></p><p class=MsoNormal><span lang=PL style='background:white'><a href="http://www.put.poznan.pl/~karol.bandurski"><span lang=EN-US style='color:blue'>www.put.poznan.pl/~karol.bandurski</span></a></span><span style='background:white'><o:p></o:p></span></p><p class=MsoNormal><span lang=PL><a href="www.ee.put.poznan.pl"><span style='color:blue'>www.ee.put.poznan.pl</span></a></span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>